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Propylene-based polymer composition, use thereof, and method for producing thermpolastic polymer composition

A technology of propylene-based polymer and thermoplastic polymer, applied in the field of propylene-based polymer composition, can solve the problems such as heat resistance and low temperature impact strength to be increased, and achieve the effect of excellent heat resistance

Active Publication Date: 2008-03-12
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the application's research, it was found that there is still room for improvement in the balance between transparency, low-temperature impact resistance, and heat resistance
[0014] In Patent Document 8, a propylene / ethylene / 1-butene copolymer is also used, but only as a thermoplastic elastomer, and it is found that its heat resistance and low-temperature impact strength still need to be increased

Method used

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  • Propylene-based polymer composition, use thereof, and method for producing thermpolastic polymer composition
  • Propylene-based polymer composition, use thereof, and method for producing thermpolastic polymer composition
  • Propylene-based polymer composition, use thereof, and method for producing thermpolastic polymer composition

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Experimental program
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Embodiment

[0879] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples.

[0880] Performance Measures

[0881] [intrinsic viscosity [η]]

[0882] Intrinsic viscosity is measured at 135°C using decalin as solvent. That is, weigh about 20 mg of a polymer in the form of powder, pellets or resin blocks, dissolve it in 15 ml of decalin, and measure the specific viscosity η of the decalin solution in an oil bath at 135° C. sp . After diluting the decalin solution by adding 5 ml of decalin, measure its specific viscosity η in the same way sp . Repeat the dilution operation twice more, and η sp The value of / C is extrapolated to zero concentration (C) to obtain the intrinsic viscosity (see equation below).

[0883] [η]=lim(η sp / C)(C→0)

[0884] [Molecular weight distribution (Mw / Mn)]

[0885] The molecular weight distribution (Mw / Mn) was measured using Gel Permeation Chromatography Mod...

Embodiment 4

[0950] (Synthesis of Propylene / Ethylene / Butene Copolymer) (B-4)

[0951] At room temperature, 1834 ml of dry hexane, 120 g of 1-butene, and triisobutylaluminum (1.0 mmol) were charged into a 4000 ml polymerization vessel sufficiently purged with nitrogen. The temperature inside the polymerization vessel was increased to 60° C., propylene was introduced to raise the system pressure to 0.56 MPa, and then ethylene was introduced to adjust the system pressure to 0.75 MPa. Then, in the polymerization container, add toluene solution, in this toluene solution, the dibenzylidene (3-tert-butyl-5-methylcyclopentadienyl) synthesized in the synthetic example 1 of 0.001mmol ( 2,7-Di-tert-butylfluorenyl)zirconium dichloride had been brought into contact with 0.3 mmol (relative to aluminum) of methylaluminoxane (manufactured by Tosoh Fine Chemicals Co., Ltd.). Polymerization was carried out for 20 minutes with the internal temperature kept at 60°C, and ethylene was supplied to maintain the ...

Embodiment X1

[0964] 80 parts by weight of the propylene-based polymer (A-1) (MFR: 25g / 10min) and 20 parts by weight of the propylene / ethylene / butene copolymer (B-1) obtained in Polymerization Example 1 (the total amount 100 parts by weight) and 0.1 parts by weight of tris(2,4-di-tert-butylphenyl) phosphate as a second antioxidant, 0.1 parts by weight of n-octadecyl-3- as a heat-resistant stabilizer (4'-Hydroxy-3',5'-di-tert-butylphenyl)propionate and 0.05 parts by weight of calcium stearate as a hydrochloric acid absorbent were mixed. In addition, 0.3 parts by weight of a phosphate ester type nucleating agent (ADK STAB NA-21, manufactured by AsahiDenka Co., Ltd.) was mixed into 100 parts by weight of the composition, and then used by The twin-screw extruder BT-30 (Φ30mm, L / D=46, rotating in the same direction) manufactured by Plabor Co., Ltd., the temperature is 200°C, the resin extrusion speed is 60g / min, 200rpm. Kneading is performed to obtain a propylene-based polymer composition. Its...

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Abstract

A propylene polymer composition comprising: (A) 41 to 95 parts by weight of a propylene polymer having Tm within the range from 120 DEG C to 170 DEG C inclusive as measured by DSC; (B) 59 to 5 parts by weight of a propylene / ethylene / a-olefin copolymer which comprises a constituent unit derived from propylene in an amount of 84.0 to 60.0 mol%, a constituent unit derived from ethylene in an amount of 15.0 to 30.0 mol% and a constituent unit derived from an a-olefin having 4 to 20 carbon atoms in an amount of 1.0 to 10.0 mol% and which has a B value within the range from 0.9 to 1.5 inclusive, based on 100 parts by weight of the total of the components (A) and (B). This polymer composition is excellent in transparency, impact resistance at low temperatures, mechanical properties (e.g., flexibility, stiffness) and heat resistance.

Description

technical field [0001] The present invention relates to propylene-based polymer compositions, their use and processes for the manufacture of thermoplastic polymer compositions. Background technique [0002] For articles made of polypropylene, excellent in transparency, impact resistance, and mechanical properties (flexibility, rigidity, etc.) with no deterioration of these properties at high temperatures (hereinafter, may be referred to as "heat resistance") A good balance is required. To date, there has never been a material with a good balance of these properties. [0003] For example, articles made of polypropylene are excellent in rigidity, heat resistance, surface gloss, scratch resistance, etc., so they are widely used. However, there is a problem that their poor low-temperature impact resistance limits their application. As a method for improving the low-temperature impact resistance of such polypropylenes, the well-known block copolymer PP (polypropylene) is produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10
CPCC08L23/142C08L23/10C08L2666/06C08L23/08
Inventor 冈本胜彦森亮二中川贵丸林博雅池永成伸土肥靖长桥幸治
Owner MITSUI CHEM INC
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